Grain cart and auger construction

ABSTRACT

A folding auger assembly. The auger assembly includes at least one auger housing configured to receive at least one driveshaft. The auger assembly further includes flighting connected to each driveshaft, a lower drive assembly configured to operatively couple the driveshaft to a first end of an output driveshaft, a driveshaft support assembly coupled to the lower drive assembly and configured to receive the first driveshaft, an output driveshaft disengagement assembly coupled to the lower drive assembly, and a stabilizer assembly.

This patent application is a continuation of U.S. patent applicationSer. No. 10/893,620, filed by Edward Oliver Brandt on Jul. 16, 2004 nowU.S. Pat. No. 7,168,554, entitled Grain Cart and Auger Construction,incorporated by reference herein, which claims priority from ProvisionalPatent Application No. 60/487,720, filed Jul. 17, 2003; incorporatedherein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Present Invention

The present invention relates generally to systems that convey bulkcommodities from primary locations in carts and wagons to secondarylocations such as barns, silos, trailers, and train cars. Moreparticularly, this invention relates to an improved, two-piece foldingauger system for grain carts, and to grain carts equipped with augerassemblies.

2. History of Related Art

Numerous agricultural implements including combines, harvesters, andgrain carts are equipped with internal grain storage hoppers. Grainharvested from the field may be conveyed for short term storage intomobile hoppers such as grain carts for subsequent towing to largerstorage bins or silos, or for transport to truck or railroad yards. Forexample, grain carts are commonly deployed during the process known ascombining, where they are towed into a convenient, receptive position bya tractor proximate a combine to periodically receive the combine'scontents for short term storage and later transfer.

Fluids and grain are moved by commonly understood displacement meansalong a continuous spiral fin helically disposed around rotating shafts.The continuous fin is sometimes called “flighting,” the apparatus istypically called an “auger,” and such displacement is generally called“augering.” As recognized by those skilled in the art, various poweredaugers with spiral flighting are employed to move grain from containerssuch as carts, wagons, trailers, truck beds, hoppers, and silos.Conventional augers may be powered by hydraulics, pneumatics, or apower-take-off (PTO), the standard means of gearing by which power froma tractor is externally transferred to various farm implements throughcommonly understood couplings.

Retractable auger systems typically include two or more foldablesections that are un-folded for use and folded for transport or storage.These auger systems are typically made of a fixed lower section insideof or adjacent to a hopper, and a moveable upper section that isun-folded into an operative position coaxially aligned with the lowersection. When properly deployed, the upper auger section delivers grainto a desired receptacle. When retracted, the upper auger section nestsagainst the cart body and assumes a safe, out-of-the-way orientationthat facilitates cart movement.

Typically, both auger sections include internal drive shafts that havespiraled flighting built into or attached to their outer diameters. Whenconfigured for operation (i.e., in the un-folded, operative position),the auger sections are aligned substantially coaxially, and theirinternal drive shafts axially mate. The power source that typicallydrives the lower auger section is thus indirectly coupled to the upperauger section. Various couplers that are well known in the art mate thetwo sections. For example, the auger drive shafts may be connected witha universal joint or with a coupling assembly that provides a “quickconnect.” Such a connection for quickly mating the upper and lower augersections may include an aligning pilot shaft made a part of the lowersection drive shaft and centered within an annular bearing. A pluralityof radial drive teeth projecting from an annular surface on the lowerauger drive shaft engage similarly arrayed teeth on the upper sectiondrive shaft. The coupler teeth are meshed when the auger segments are inthe un-folded, operative position, and the drive shafts aresubstantially aligned.

Grain cart augers are subjected to appreciable stresses. The load borneby the flighting during high volume operation exerts appreciable lateraland torsional stress on the drive apparatus, flighting, drive shafts,and the shaft control bearings. Stresses are dynamically imposed on thestructure in a variety of changing directions. Occasionally,particularly at start-up, a load jars the apparatus and subjects theflighting to forces that tend to unbalance or misalign the multipleauger sections. Improper auger section alignment can easily result inbearing failure and other damage to the apparatus.

Prior art grain cart auger mechanisms suffer from maintenance andreliability problems. Mechanisms must be rugged in order to withstandthe impacts and the rain, dust, and temperature changes inherent in farmuse. Mechanisms that have moving parts are particularly vulnerable toharsh operating conditions. And mechanisms that are built in sectionsfor conversion from an un-folded, operating profile to a folded,transport profile are also vulnerable. Accordingly, it would bebeneficial to have an auger assembly that can withstand harsh conditionsand be easy to maintain and have sections that easily align when theauger assembly is in the un-folded, operative position.

SUMMARY OF THE INVENTION

The present invention provides an improved stabilized, multiple sectionauger assembly. The present invention withstands harsh farm usage andprovides for easy maintenance and has sections that easily align whenthe present invention is in the un-folded, operative position. Itsself-centering, flexible design reduces auger jamming and drive-trainwear. For improved serviceability over prior art, the present inventionprovides a simplified means of disengaging the auger drive assembly fromthe gearbox that drives the auger assembly. This enables easy removal ofthe lower auger driveshaft from the drive gear for maintenance purposes.The present invention's disclosed preferred provision for disengagementof seized or rusted drive shaft components significantly enhances theauger assembly's maintenance and serviceability. Furthermore, thepresent invention has special adaptations for preservation of alignmentand dependable coupling of the multiple auger sections. The new augersystem may also be easily retracted and folded into a stable storageposition when not in use.

In the preferred embodiment, the new auger assembly has a lowerstationary section and a foldable upper section that features aself-centering and stabilizing mechanism. The movable upper section ishinged to the fixed lower section. The bottom of the lower section isconfigured to communicate with a cart hopper. The bottom of the uppersection is mated to the top of the lower section, thus creating a drivelink between the two sections. When the deployed auger system isactivated, grain or other materials are conveyed from the hopper'sinterior through the aligned auger sections to a material dischargechute. Both the upper and lower sections are uniquely designed forimproved resistance to the potentially damaging torsional and axialforces encountered during heavy use.

The driveshafts of the present invention may be supported by one or morethrust bearings, and the upper section features a stabilizer assembly atits top to preserve concentricity while allowing axial displacements.The upper section terminates at its top in a projecting stabilizerassembly that is terminated within a centered bearing assembly. In oneembodiment of the present invention, a rigid coiled spring coaxiallymounted on the stabilizer assembly normally urges the upper sectiondownwardly into driving engagement with the lower section.

BRIEF DESCRIPTION OF THE DRAWINGS

In the following drawings, like reference numerals have been employedthroughout wherever possible to indicate like parts in the variousviews. In some of the drawings, parts of the apparatus are broken away,omitted, or shown in section for clarity. The structure and operation ofthe invention will become apparent upon reading the following detaileddescription and upon reference to the accompanying drawings in which:

FIG. 1 is a front isometric view of a grain cart equipped with thepreferred auger assembly;

FIG. 2 is an enlarged, exploded, elevation assembly view of the lowerauger section;

FIG. 3 is an enlarged, partially exploded elevation view of the lowerauger section's lower drive assembly, corresponding to circled region“3” of FIG. 2;

FIG. 4 is an enlarged, exploded elevation view of the lower auger'slower drive assembly;

FIG. 5 is a partially exploded isometric view of the lower augersection's lower drive assembly;

FIG. 6 is a top isometric view of the lower auger section's lower drivecollar;

FIG. 7 is a bottom isometric view of the lower auger section's lowerdrive bearing;

FIG. 8 is a partially exploded, elevation view of the lower augersection's upper coupling assembly that corresponds to circled region “8”of FIG. 2;

FIG. 9 is a partially exploded elevation assembly view of the upperauger section;

FIG. 10 is an enlarged, partially exploded elevation view of the upperauger section's stabilizer assembly;

FIG. 11 is a partially exploded isometric view of the upper augersection's stabilizer assembly;

FIG. 12 is an enlarged elevation view of the stabilizer assembly;

FIG. 13 is an elevation view of the stabilizer assembly;

FIG. 14 is a top plan view of the stabilizer assembly, as viewed from aposition to the left of FIG. 13;

FIG. 15 is a bottom plan view of the stabilizer assembly, as viewed froma position to the right of FIG. 13;

FIG. 16 is an isometric view of the stabilizer assembly; and

FIG. 17 is a sectioned longitudinal isometric view of the stabilizerassembly.

While the invention is susceptible to various modifications andalternative forms, specific embodiments thereof are shown by way ofexample in the drawings and will herein be described in detail. Itshould be understood, however, that the drawings and detaileddescription presented herein are not intended to limit the invention tothe particular embodiment disclosed. On the contrary, the invention islimited only by the claim language.

DETAILED DESCRIPTION OF THE INVENTION

As illustrated in FIG. 1, auger assembly 62 may be connected to graincart 50. Cart 50 includes a rigid frame 52 that supports a centralhopper 54 that resembles a hollow, inverted, truncated pyramid. As isconventional in such devices, grain loaded into central hopper 54through opened top 63 falls under the force of gravity toward the bottomof the hopper where it contacts lower auger section 66. Frame 52includes a rigid, elongated, wheeled axle 56 supporting wheels 57 thattraverse the field or ground 58. The tongue assembly 60 projecting fromthe front of central hopper 54 enables towing by conventional farmmachinery, preferably accomplished with suitable hydraulic connections.In the present invention, a preferably multiple-piece auger assembly 62is located on one side of cart 50.

Auger assembly 62 includes a movable, upper auger section 64 hinged to astationary lower auger section 66. The bottom of lower auger section 66communicates with the interior of central hopper 54. Hinge 67 couplesupper auger section 64 to lower auger section 66. Upper auger section 64is illustrated in the folded, out-of-the way transport position,disengaged from lower auger section 66. When central hopper 54 is to beunloaded, upper auger section 64 is un-folded into axial alignment withlower auger section 66, and the upper and lower sections are coupled ina manner discussed below.

When auger assembly 62 is activated by means of a drive mechanism,discussed below, that rotates the augers in auger sections 64 and 66,grain is conveyed from the interior of central hopper 54 upwardly andoutwardly through the aligned auger sections for eventual delivery to aremote storage bin, or the like, through discharge chute 148 that may beoriented in various directions. In the preferred embodiment, upper augersection 64 is hydraulically displaced between the normal deployedposition and the retracted transport position illustrated in FIG. 1.Various mechanisms for displacing multiple-part, folding augerassemblies between the normal deployed position and the retractedtransport position are well known in the art.

To ensure proper operative alignment and concomitant durability of thedeployed auger sections, the present invention provides uniquemechanical adaptations of auger sections 64 and 66. For assurance thatthe entire load of both auger sections is not borne by the drivemechanism, lower auger section 66 is rigidly attached to central hopper54, and the auger driveshafts, described below, are supported by thrustbearings that transfer the weight of auger assembly 62, as well as theaxial forces developed in the auger sections' driveshafts, to augersections 64 and 66 that in turn transfer the weight to central hopper54.

FIG. 2 is an enlarged, exploded, elevation assembly view of the lowerauger section of the present invention. Lower auger section 66 may beconnected to a twin shaft reduction gearbox 72 through lower driveassembly 84. A suitable gearbox unit is the fifty-degree versionavailable from the Superior Gear Box Co. of Stockton, Mo. Power isdelivered to gearbox 72 via input shaft 74 that may be connected with aflexible drive shaft (not shown) to a tow vehicle's PTO output, or to asuitable drive motor.

As explained below, the bottom of upper auger section 64 connects to thetop of lower auger section 66 when upper auger section 64 is deployedfor operation. Gearbox output driveshaft 75 drives lower drive assembly84 which in turn drives driveshaft 80 of lower auger section 66 which inturn drives driveshaft 142 of upper auger section 64 (see FIG. 9), thuscausing rotation of the entire auger assembly.

As further illustrated in FIG. 2, lower auger section 66 includes anelongated auger housing 78 in which driveshaft 80 supportingconventional helical flighting 82 is coaxially disposed. In a preferredembodiment of the present invention, auger housing 78 is tubular shaped.Driveshaft 80 extends from lower drive assembly 84 and engages upperdrive assembly 86 at the top of lower auger section 66 with an elongatedpilot shaft 120. As used herein, “flighting” refers to appendages of anygeometry, continuous or discontinuous, symmetrical or asymmetrical,helical or non-helical, that are configured to move objects along anaxis when attached to a substantially central member that is rotatedabout such axis.

FIG. 3 is an enlarged, partially exploded elevation view of lower driveassembly 84 according to the preferred embodiment of the presentinvention. As depicted in FIG. 3, lower drive assembly 84 may includedrive collar 90 that coaxially receives the lower hollow end of augerdriveshaft 80. In a preferred embodiment of the present invention, drivecollar 90 is rigid and splined and includes an elongated splinedcylindrical shank 92, an intermediate cylindrical section 94, and anupper, larger diameter cylindrical head 96. Drive collar 90 is coaxiallyfitted to circular drive plate 98, with shank 92 penetrating plateorifice 109 of lower auger plate 99 (see FIG. 5). In a preferredembodiment of the present invention, drive plate 98 is welded to drivecollar 90; lower auger plate 99 is circular disk sized and welded so asto close the lower end of auger housing 78; and shank 92 is supportedwithin driveshaft support assembly 102.

In a preferred embodiment of the present invention, drive plate 98rotates within the lower end of auger housing 78 and includes orifice 55(see FIG. 6) which is configured to receive drive pin 79 (see FIG. 2)connected to driveshaft 80. In this preferred embodiment, outputdriveshaft 75 turns drive collar 90 which in turns drives drive plate 98which in turn drives driveshaft 80 by way of drive pin 79. It should benoted, that connection of driveshaft 80 to drive plate 98 by way ofdrive pin 79 permits driveshaft 80 to rest upon drive collar 90 and tobe removed from lower auger section 66 without the need to remove lowerdrive assembly 84. In an alternative embodiment of the presentinvention, lower drive assembly may be a gearbox, sleeve, or othercoupling mechanism that operatively connects output driveshaft 75 todriveshaft 80.

It may occasionally be necessary to service auger assembly 62. Forexample, when changing gearbox 72, output driveshaft 75 must bedisengaged from lower drive assembly 84. Specifically, output driveshaft75 must be disengaged from driveshaft support assembly 102 and collarshank 92. After long periods of time, and with insufficient lubrication,these parts may develop a tendency to seize, making separationdifficult. For this reason, output driveshaft disengagement assembly 117(see FIG. 4) is provided to facilitate the decoupling of outputdriveshaft 75 from driveshaft support assembly 102. Service bolt 110 isthreadably coupled to drive collar 90 in coaxial alignment withdriveshaft 80. Service bolt 110 may include bolt head 112 that drivesintegral threaded shank 113 through the threaded inner diameter of drivecollar 90. In a preferred embodiment of the present invention, bolt head12 is hexagonal in shape. When bolt head 112 is sufficiently rotated,the tip of shank 113 exits the drive collar's splined shank 92 and makescontact with the tip of output driveshaft 75 that protrudes throughdriveshaft support assembly 102. Service bolt 110 is normally maintainedin a non-interfering fixed position atop drive collar 90 by retainer nut114 that is tightened upon initial assembly. Thus, during normaloperation, service bolt 110 is not engaged. However, when augerdriveshaft 80 is removed from collar head 96 for service, bolt head 112and retainer nut 114 are accessible. In one embodiment of the presentinvention, access to bolt head 112 and retainer nut 114 is through aservice door in the side of lower auger section 66. After retainer nut114 is loosened, service bolt 110 may be turned to force shank 113 intocontact with output driveshaft 75, forcibly disengaging drive collar 90from gearbox 72.

FIG. 4 is an enlarged, exploded elevation view of lower drive assembly84. In a preferred embodiment of the present invention, drive collar 90mounts coaxially atop drive plate 98, with shoulder 95 beneathintermediate cylindrical section 94 mounted flush with the upper surface98A of drive plate 98. As noted above, driveshaft 80 may be connected todrive plate 98 by way of drive pin 79 so that driveshaft 80 and itsflighting 82 are rotated in response to rotation imparted by gearbox 72.FIG. 4 also shows service bolt 110 discussed above.

FIG. 5 is a partially exploded isometric view of the lower driveassembly 84. It will be noted that drive plate 98 is not shown. Outputdriveshaft 75 (see FIGS. 2 and 3) is coaxially fitted within splinedpassageway 93 in collar shank 92. In a preferred embodiment of thepresent invention, shoulder 95 limits the distance that collar shank 92extends through orifice 109 and orifice 104 and driveshaft 75 fitssecurely within splined passageway 93 without the use of fasteners. Inan alternative embodiment, output driveshaft 75 is secured to passageway93 by radially spaced-apart Allen screws 100. While torsional forces arethus imparted by output driveshaft 75, driveshaft support assembly 102bears the majority of the axial load imparted by the auger section andthereby, significantly reduces both the radial and thrust forces thatwould otherwise be placed on output driveshaft 75 by driveshaft 80. Itwill be noted that coupling of driveshaft support assembly 102 to lowerauger plate permits these radial and thrust forces to dispersed to augerhousing 78. Collar shank 92 extends through orifice 109 into and throughorifice 104 in driveshaft support assembly 102 and the weight ofdriveshaft 80 is thereby supported by driveshaft support assembly 102which in turn is mounted beneath lower auger plate 99 upon bottomsurface 99B by a plurality of bolts 105 that penetrate bearing mountingorifices 106 and the aligned orifices 107 in lower auger plate 99. Itshould be noted that attachment of driveshaft support assembly 102 tolower auger plate 99 and the insertion of driveshaft 75 into splinedpassageway 93 results in lower auger section 66 being sealed and,thereby, preventing materials being discharged by the present inventionfrom escaping through the bottom of lower auger section 66. While bolts105 are depicted with the heads contacting driveshaft support assembly102, it will be appreciated that bolts 105 may be inserted from theopposite direction so that the heads of bolts 105 contact the uppersurface of lower auger plate 99. In one embodiment of the presentinvention, bolts 105 are plow bolts with a four corner shoulder that fitinto aligned orifices 107 (which orifices 107 are square shaped so as tosecurely receive bolts 105), and bolts 105 may be secured by center locknuts.

FIGS. 6 and 7 show alternative views of drive collar 90, the hollowportion of lower driveshaft 80, drive pin 79, and splined collar shank92 protruding from driveshaft support assembly 102. As noted above,while bolts 105 are depicted with the heads contacting driveshaftsupport assembly 102 in FIG. 7, it will be appreciated that bolts 105may be inserted from the opposite direction so that the heads of bolts105 contact the upper surface of lower auger plate 99.

FIG. 8 is a partially exploded, elevation view of one embodiment of anupper coupling assembly for lower auger section 66 that corresponds tocircled region “8” of FIG. 2. In a preferred embodiment of the presentinvention, upper coupling assembly 86 may be located at the top of lowerauger section 66 and provides driveable connection to upper augersection 64 when upper auger section 64 is un-folded into the deployedoperational position. The uppermost end of lower auger driveshaft 80(shown in FIG. 2) is coupled to elongated pilot shaft 120 that includesa terminal drive portion 122. Driveshaft 80 is suspended for rotationwithin auger housing 78. In a preferred embodiment of the presentinvention, driveshaft 80 is suspended for such rotation by hangerbearing 126 that is joined by at least one spoke 128 to partiallycircumferential flange 127 that is attached to the inner cylindricalsurface of auger housing 78. Drive portion 122 of pilot shaft 120protrudes through the inner diameter of hanger bearing 126 and isattached to the inner diameter of upper drive gear 130 with commonlyunderstood fasteners such as Allen screws. In a preferred embodiment ofthe present invention, drive portion 122 of pilot shaft 120 is keyed andis attached to the inner diameter of upper drive gear 130 with key andAllen screws. Radial teeth 132 of drive gear 130 are separated by radialspaces 134. Hanger bearing 126 achieves centering and alignment, andacts as a radial bearing for driveshaft 80.

FIG. 9 is a partially exploded elevation assembly view of upper augersection 64. In a preferred embodiment of the present invention, upperauger section 64 may include elongated tubular housing 143 that isconcentric with the internal driveshaft 142 that supports conventionalspiral flighting 144. The upper end of tubular housing 143 terminates inupper auger plate 147, that may be adjacent to discharge chute 148. Theuppermost end 150 of driveshaft 142 is terminated and supported bystabilizer assembly 155, discussed below. While shown outside of tubularhousing 143 for clarity, it is to be noted that portions of stabilizerassembly 155 are contained within tubular housing 143 as noted in moredetail in FIG. 10.

In the preferred embodiment of the present invention, at least one drivepin 136 is welded to and projects downwardly from driveshaft 142 ofupper auger section 64. Upper auger section 64 is foldably connected tolower auger section 66 with conventional hinge 67 (see FIG. 1), and whenupper auger section 64 is un-folded into the operative position, atleast one drive pin 136 is pressed downwardly to engage drive gear 130at the top of lower auger section 66 (see FIG. 8). When upper augersection 64 is first un-folded into the operative position relative tolower auger section 66, drive pin 136 may or may not engage drive gear130. If drive pin 136 fails to engage a space between two of the gearteeth on drive gear 130, the spring-loaded feature of stabilizerassembly 155 will enable hinge 67 to close and the upper and lower augersections 66 and 64 to be securely mated. In that case, when rotation oflower auger section driveshaft 80 commences, drive gear 130 will rotate,causing drive pin 136 to fall into a space between two adjacent drivegear teeth 132 under spring-loaded downward urging from stabilizerassembly 155. Such spring-loaded engagement is automatic, and thebearing assembly 162 (discussed and shown in FIG. 10 below) centeringeffects will maintain proper operative alignment.

FIG. 10 is an enlarged, partially exploded elevation view of stabilizerassembly 155 of upper auger section 64 and shows that, concurrent withits provision of concentricity between upper auger section 64 and lowerauger section 66, the present invention accommodates axial displacementof the lower and upper section driveshafts 80 (see FIG. 2) and 142 (seeFIG. 9), respectively. Compression spring 170 concentrically mounts onneck 160 and intermediate section 157, and abuts shoulder 159 ofstabilizer 156. When assembled, spring 170 is compressed betweenshoulder 159 and the underside of upper auger plate 147. Stabilizer 156and neck 160 are axially slideable with respect to the upper auger plate147 as compression spring 170 compresses or elongates. Thus, axialdisplacement of lower auger driveshaft 80 and its flighting 82, andupper auger driveshaft 142 and its flighting 144 are accommodated, i.e.,the auger assembly driveshaft axial displacement is constrained only tothe extent of desired allowable compression of spring 170. While thepreferred embodiment of the present invention includes spring 170,alternative embodiments of the present invention may include othercompression devices well know in the art for maintaining the downwardforce on driveshaft 142.

In a preferred embodiment of the present invention, stabilizer 156includes a rigid, cylindrical base 158, a concentric cylindricalintermediate section 157, and neck section 160. Cylindrical base 158 iscoaxially coupled to upper end 150 of driveshaft 142 of upper augersection 64. In a preferred embodiment of the present invention, upperend 150 of driveshaft 142 is welded to cylindrical base 158. In analternative embodiment, such coupling may be accomplished by threadingmeans. Alternatively, connection may be accomplished by being receivedinto a hollow end of driveshaft upper end 150 and secured by means offasteners such as Allen screws.

Neck 160 projects through compression spring 170, an opening in bushing161, and upper auger plate 147, and is received within bearing assembly162. In a preferred embodiment of the present invention, neck 160 issquare shaped and the opening in bushing 161 is square shaped. Retainingbolt 166 penetrates washer 168 and bushings 169 and 161, and engages atapped hole in neck 160 on stabilizer 156 to axially capture upper augerdriveshaft 142 and flighting 144 within housing 143. The number ofbushings 169 can be varied to affect both spring 170 preloading and theaxial displacement of driveshaft 142 so as to facilitate alignment withdriveshaft 80 when upper auger section 64 is un-folded into theoperative position.

FIG. 11 is a partially exploded isometric view of stabilizer system 155of upper auger section 64. In a preferred embodiment of the presentinvention, bearing assembly 162 facilitates rotation of upper augerdriveshaft 142 and resists forces that would tend to misalign theapparatus by destroying concentricity of driveshafts 80 and 142. Bearingassembly 162 may be mounted atop upper auger plate 147 at the top ofupper auger section 64 with a plurality of bolts 165. FIG. 11 alsooffers an isometric view of retaining bolt 166, washer 168, bushings 161and 169, compression spring 170, and tapped hole 163 in neck 160 onstabilizer 156.

FIG. 12 illustrates thrust bearing 162 bolted to upper auger plate 147,and retaining bolt 166 seated in the tapped hole in the end of squareneck section 160. Spring 170 is therefore illustrated in a captured andcompressed condition.

FIG. 13 is an elevation view of stabilizer 156.

FIG. 14 is a top plan view of stabilizer 156, as viewed from a positionto the left of FIG. 13.

FIG. 15 is a bottom plan view of stabilizer 156, as viewed from aposition to the right of FIG. 13. In a preferred embodiment of thepresent invention, base 158 includes chamfered lower end 177 and flatbottom face 179 for facilitating the mounting and alignment to upper end150 of driveshaft 142 of upper auger section 64.

FIG. 16 is an isometric view of stabilizer 156. Shoulder 159 with achamfer 153 separates intermediate sections 157 and 158.

FIG. 17 is a sectioned longitudinal isometric view of stabilizer 156.

It will be understood that certain features and subcombinations areutilitarian in and of themselves, and may be employed without referenceto other features and subcombinations. Furthermore, while the presentinvention has been described in terms of one preferred embodiment and afew variations thereof, it will be apparent to those skilled in the artthat form and detail modifications may be made to those embodimentswithout departing from the spirit or scope of the invention.

1. An auger assembly comprising: a first auger housing; a firstdriveshaft housed within said first auger housing; a gearbox includingan output shaft; and a drive assembly to receive said output shaft anddrive said first driveshaft, said drive assembly including a mechanismto push apart the output shaft from the drive assembly.
 2. The assemblyof claim 1, wherein said drive assembly includes a driveshaft supportassembly configured to receive a first end of said first driveshaft;wherein said driveshaft support assembly is configured to bear theradial and thrust forces imparted by said first driveshaft.
 3. Theassembly of claim 1, further comprising: a second auger housing foldablycoupled to said first auger housing; a second driveshaft housed withinsaid second auger housing; wherein a first end of said second driveshaftis configured to operatively couple to a second end of said firstdriveshaft; and a stabilizer assembly coupled to a second end of saidsecond driveshaft.
 4. The assembly of claim 3 wherein said stabilizerassembly is configured to maintain a force on said second driveshaft. 5.The assembly of claim 4, wherein the stabilizer assembly includes acompression device coupling an upper plate of said second auger housingto a second end of said second driveshaft.
 6. The assembly of claim 5,wherein the compression device comprises a spring.
 7. An auger assemblycomprising: a first auger housing; a first driveshaft housed within saidfirst auger housing; a gearbox including an output shaft; a driveassembly to receive said output shaft and drive said first driveshaft,said drive assembly including a mechanism to disengage the output shaftfrom the drive assembly; a second auger housing foldably coupled to saidfirst auger housing; a second driveshaft housed within said second augerhousing; wherein a first end of said second driveshaft is configured tooperatively couple to a second end of said first driveshaft; and astabilizer assembly coupled to a second end of said second driveshaft;wherein said stabilizer assembly is configured to maintain a force onsaid second driveshaft wherein the stabilizer assembly includes acompression device coupling an upper plate of said second auger housingto a second end of said second driveshaft, wherein the compressiondevice comprises a spring; wherein said stabilizer includes acylindrical base and a neck section, wherein said cylindrical base isattached to said second end of said second driveshaft; wherein said necksection projects through said spring and said spring is compressedbetween said upper plate of said second auger housing and a surface ofsaid cylindrical base.
 8. The auger assembly of claim 7, wherein saidstabilizer further includes a cylindrical intermediate section that isconcentric with said cylindrical base.
 9. An auger assembly comprising:a first auger housing; a first driveshaft housed within said first augerhousing; a gearbox including an output shaft; a second auger housingfoldably coupled to said first auger housing; a second driveshaft housedwithin said second auger housing; wherein a first end of said seconddriveshaft is configured to operatively couple to a second end of saidfirst driveshaft; a stabilizer assembly coupled to a second end of saidsecond driveshaft; and a drive assembly to receive said output shaft anddrive said first driveshaft, wherein said drive assembly includes amechanism to push apart the output shaft from the drive assembly.
 10. Anauger assembly comprising: a first auger housing; a first driveshafthoused within said first auger housing; a gearbox including an outputshaft; a second auger housing foldably coupled to said first augerhousing; a second driveshaft housed within said second auger housing;wherein a first end of said second driveshaft is configured tooperatively couple to a second end of said first driveshaft; astabilizer assembly coupled to a second end of said second driveshaft;and a drive assembly to receive said output shaft and drive said firstdriveshaft, wherein said drive assembly includes a mechanism todisengage the output shaft from the drive assembly, wherein saidmechanism comprises a bolt threadably coupled to said drive assembly incoaxial alignment with said output shaft.
 11. An auger assemblycomprising: a first auger housing; a first driveshaft housed within saidfirst auger housing; an output driveshaft; a lower drive assemblyconfigured to operatively couple said output driveshaft to a first endof said first driveshaft, wherein said lower drive assembly includes adrive collar suitable for receiving a first end of said firstdriveshaft; and wherein said first auger housing includes a lower augerplate defining an orifice suitable for receiving said drive collar.